Open Doc URL to Passing a Parameters to input control on a scheduled report

I am looking for a solution to create a Open Doc url to pass parameters to a Input control on a scheduled reports.

We have report in BO which is already been scheduled. Now the requirement is users who ever logs in should see their report first. there is a EMP id field in the input control where it has to show up the user who has logged in. emp id is same as User Logged in.

We are not looking for a Query level filter as this will take time to run the report. we need to run the report and have the values defaulted for the users.